Book/Report

FZJ-2018-04177

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Schichtwachstum und Zwischenschichtaustauschkopplung in epitaktischen Eisen-Schichtsystemen

Fuß, H.-A. (Corresponding author)FZJ*

1993
Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag Jülich

Please use a persistent id in citations: http://hdl.handle.net/2128/19320

Report No.: Juel-2740

Abstract: In this thesis the exchange coupling of Fe films across Al, Au, and Au-Cu alloy interlayers with good epitaxial growth was investigated. The epitaxial and cristalline quality of the layers was controlled by SPA-LEED, RHEED and Auger electron spectroscopy. The magnetic properties of the multilayers were measured with MOKE (magneto-optical Kerr effect), Brillouin light scattering and a Kerr microscope. For the first time coupling across Al and Au$_{1-x}$Cu$_{x}$ was found to beantiferromagnetic. In addition to the thickness dependent long period (Fe/Au/Fe: ~ 8 ML) oscillation of the coupling that is well known for many other interlayermaterials (e. g. Cr), short period oscillations in Fe/Au/Fe and Fe/Au$_{1-x}$ Cu$_{x}$/Fe (~ 2 ML) multilayers were observed. This obversation could be correlated with the much better growth of Au and Cu on Fe in comparison to Al on Fe. In all systems we also found a strong contribution of biquadratic coupling previously identified for the Fe/Cr system. The results strongly support an RKKY-type mechanism as the microscopic origin of this coupling behavior. The magnetoresistance was measured for the Fe/Cr/Fe system, especially the dependence on the substrate material and on the Cr-thickness. It could be demonstrated that the magnetoresistance is also affected by the long and short period oscillations of the coupling strength.

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Contributing Institute(s):

1. Publikationen vor 2000 (PRE-2000)

Research Program(s):

1. 899 - ohne Topic (POF3-899) (POF3-899)

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